KIA Subtitle <= 4.0.1 - [Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')]
Strategic Overview
- Status
- Patched in 4.0.2
- Affected Plugin
- KIA Subtitle
- Affected Version
<= 4.0.1- CVSS
- 6.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2026-7509
At a glance
CVE-2026-7509 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the KIA Subtitle WordPress plugin, affecting versions <= 4.0.1. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 4.0.2; sites on affected versions should update now. Disclosed May 2026, reported by zaim.
Vulnerability Overview
The KIA Subtitle plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `the-subtitle` shortcode `before` and `after` attributes in all versions up to, and including, 4.0.1. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in KIA Subtitle <= 4.0.1 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For KIA Subtitle the fix is 4.0.2: builds <= 4.0.1 are affected, anything from 4.0.2 onward is not.
Remediation
Update to version 4.0.2, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to KIA Subtitle: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: KIA Subtitle 4.0.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C